Ventilator.



No. 822,074. PATENTBD MAY 29, 1906.

G. L. PULLMAN.

VBN'IILA'IOR.I

APPLICATION FILED JULY 19. 1900.

UNITED STATES; 112A minion..

edili-LES LiiwiS PULLMAN, onl PEQUNAGQNEW JERSEY, Assrenonro- THEPULLMAN AUTOMATIC VENTILATORCOMPANY, OF WASHINGTON, DISTRICT OFCOLUMBIA,v A LCORPORATIONOF WEST.` VIRGINIA.

` No.J 822,074.

ySpecification ofLetters-"Patent Application led July 19. 190 0. SerialNo. 24,215.

@temeer May 29,1906.

.T0 a/ZZ whom t may concern: j

Be it known that I, CHARLES LEWIS PULL- MAN, a citizen of the UnitedStates, residing at Pequanac, in the county of Morris and State of NewJersey, have invented certain new and useful Improvements inVentilators; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

The object is in a simple and efficient manner to effect ventilation ofa car, steamboat, or other moving object, or of the rooms of a buildingor other inclosed space, either by supplying air thereto or byexhausting air therefrom.

With this object in view the invention consists in the novelconstruction and combination of parts of a Ventilating device, as willbe hereinafter fully described and claimed.

In the accompanying drawings, forming a art of this specification, andin which like etters of reference indicate corresponding parts, Figure lis a view in perspective, exhibiting the form of device used as anintake. Fig. 2 is a view in sectional plan of the device shown inFig. 1. Fig. 3 is a view in perspective, exhibiting the form of deviceused as an outtake.

Referring to the drawings, and to Figs. and 2 thereof, in which a formof apparatus adapted for ventilating cars, buildings, rooms, &c., by anintake of air is exhibited, A designates a plate provided with anopening or orifice a, Which has a screen a2. The plate may be made ofone piece of metal', wood, or the like, or of a plurality of detachablesections secured together in such manner as to be adjustable lengthwiseto permit the plate to be fitted to windows of different widths. Securedto the plate is a valve-casing as, which may be of any suitable materialand preferably in the shape shown-that is, a double inclined structurewith the hip at the center of the length of the` casin Pivoted withinthe casing and spanning t eopening a is a valve a4, of metal andpreferably curved, and secured to the valve is a short hollow lugorprojection a5 to be engaged by the end of a two-armed lever a, thearms being pivotally mounted at the hip of the casing and projectingoutward through slots a7 beyond the'same. The. endof thejleverenf gagingthe lug a5 is rounded or ,is provided with a ball, rthus effecting aballandsocl` et joint connection between these parts, and `thisform ofconnection is that which will generally be preferred; but it is to beunderstood that I do not limit the invention to this particulararrangement, as any other form of joint may be j employed, if preferred.Carried by the arms of the lever projecting beyond the casing is a vaneas, whlch through the medium of the joint above described will cause thevalve to close that end of the casing mouthing toward the direction fromwhich the current of air comes, so that air will be taken into the casing from the direction opposite that in which the current comes, thus atall times insuring a supply 0f smoke, dust, and cinder free air into thecar or other space to be ventilated, while the closed end of the casingwill preclude entrance of rain or snow into such space.

It will be observed that the casing a3 is of greater length than thevalve-that is to say, projects at each end some distance beyond the endsof the valve. This construction of casing is employed where the deviceis to be used as an air-intake, the intake resulting from the air thatrushes in to fill the partial vacuum produced at the rear end ofthecasing by the passage of air past that end, it being apparent that bythe extensions referred to the direct current or moving body of aircannot itself enter the casing, but by reason of the shape of theback ofthe casing will be shunted past the open end thereof, and thus createthe vacuum referred to. As is well known, when a train is in motionthere is always a back or resultant draft caused by' the air from therear of the train rushing in to fill the partial vacuum created by thesplitting of ythe air by the train, and it is this back or resultantdraft or current of air that is utilized in operating this device tosupply air to `as the intakejy just described, in that the IOO inclinedsurfaces of the casing are shortened to bring the extremities thereofnearer the line ofthe end walls of the orifice in the back plate, sothat the end of the casing mouthing in the direction in which thecurrent of air is moving or in which the body may be moving will by theaction of such current cause a suction that will operate to Withdraw airfrom the interior of the space, thus effecting ventilation by an outtakeof air, as opposed to the operation of the device shown in Fig. 1

which eects ventilation by an intake of air. Having thus fully describedmy invention,

what I claim as new, and desire to secure by Letters Patent of theUnited States, is-

In a ventilator, a casing, bridging an opening communicating with thechamber to be ventilated, the opposite ends of the casing being open andits outer wall being hipped to form a defector, a curved valve pivotallymounted within the casing, and movabie auto "maticaIly to cut 0Hcommunication between either end of the casing and the Chamb erop`ening, a lug secured to the outer face of the valve and having a pocket oropening, a lever pivoted to the outer wall ofthe casing and extendingthrough an' opening therein, one arm of the the lug, and a vane carriedby theopposite arm of Said lever.

In testimony whereof I afIiX my signature in the presence of twosubscribing witnesses.

CHARLES LEWIS PULLMAN. Witnesses:

R. G. DYRENFORTH, R. M. ELLIOTT.

Vlever extending into the pocket or opening of

